M.2 drives on POST screen

[Eighjan]

This may be equally valid in here or the Motherboard section, but since it revolves around m.2 drives, I've posted it here... by all means, if it belongs in Motherboards, please evict it from here & repatriate it accordingly.

MSI B550 Tomahawk; on power-on it only reports the three S-ATA drives connected to it on the POST screen & I was wondering if there is a way to get the two m.2 drives I have installed in the 'board reported here, too?
I don't know that it's even possible, so I could be on a hiding to nothing; full rig in 'signature'.

Thanks, in advance, for any light that can be shed on this...

[alyen]

You need to check the manual to determine if the m.2 slots shares any lanes with any specific SATA ports, or any of the PCIE slots.

[Eighjan]

4 hours ago, alyen said:

You need to check the manual to determine if the m.2 slots shares any lanes with any specific SATA ports, or any of the PCIE slots.

The drives work - one of them is the OS drive - but the BIOS "front page" doesn't see them them in the same way it does with S-ATA drives... it may not even be possible to see them, just curious if it can & what I'd need to do that I haven't done already.